Device for time dipping



june i6, i931. E, RQ STEVENS ET AL 1,809,991

' v DEVICE ma TIME bIPPING June 16, 1931. 9 E. R. gsfrlvENsv E1' AL 1,809,991

DEVICE FQR TIME DIPPING Filed oct. 24, 1929 2 sheets-sheet 2 Patented June 16, 1931 UNITED STATES PATENT F'FICI?.A

EDWARD R. STEVENS AND ARTHUR F. NICOLAI, OF IPOTLAN'D, OREGON DEVICE Fon TIME DIPPING Application filed October 24, 1929. Serial No. 402,0795.

Our device is primarily intended for the b painting, enameling, or coating of products with varnish, aint, oil coatings and the like and is primarlly adapted for mass producw tion. v

The device consists primarily of a supporting head. (Sruideways are disposed in the line of travel of the head for predetermining the path of travel of the supporting t@ head. A counter-balanced weight lis associated with the head for maintaining the supporting head in a normal state of repose.

Means are provided| for settably predetermining the rate of return of the supporting w head to normal position when the same has been actuated into a cycle of operation.

One of the objects of our invention is to coat articles of manufacture, in mass production to produce a coating of uniform quality.

A further object of our invention consists in providing means for coating articles of manufacture by immersing the same for a predetermined time within a -vat in which the coating solution is provided.

A further object of our invention consists in providing means for predetermining the time of immersion of articles of manufacture within the coating solution and for predetermining the temperature of the coating solu- 30 tion during-the coating operation.

A further object of our invention consists -in providing means for automatically lower- -ing a supporting head upon which articles of manufacture are supported for immersion within acoating solution disposed within a tank ltherebelow and for automatically determining the nate of return of the materials from the coating solution.

With these and incidental objects in view, the inventibn consists in certain novel features of construction and combination of arts, the essential elements of which are set orth in the ap ended claim, and a preferred form of embodiment of which is hereinafter shown with reference to the drawings which accompany and form a part of this specification.

In the drawings: Fig. 1 is a front view, partially in section, of the assembled device. l

l of a valve for predetermlning the rate o f return of the supporting head to normal position after the same has been mechanically, or manually, actuated.

Fig. 4 is a sectional, vertical, side view of a 60 valve through the lowering of which a liquid is trapped within the valve body.

Fig. 5 is a front view of a modified form of supporting structure and having settable means for predetermining the rate of return through hydraulic control valves of the supporting head. l

Like reference characters' refer to like parts throughout the several views.

'We referably form our device of a f abri- 70 l cated rame, consisting of vbase elements 1 and having supporting posts 2 upwardly extending from the base. A cross girder 3 rests upon the posts, and extends from one to the other. Restingy upon the base elements 1 is 75 a cross base support 41. The posts are main-v tained in ay substantially vertical position through the action of braces 5 and 6 extending dlagonally from the base to the vertical posts. Side sway is lprevented in the assembled frame through the action of brackets 7 and 8 extending from the posts to the cross bar 3. A tank 9 is disposed within the frame and normally rests upon the support 17. A second cross bar 10 is disposed between the 85 vertical posts 2. Guide bars 11 and 12 are positioned between the cross bars 10 and 3. These guide bars are parallelly disposed in vertical position and are preferably made offnished metal to reduce the frictional engagement between the bearings or blocks disposed upon the head, to form -guldeways upon which the supporting heads are dis osed. The supporting head is made of guide. locks 13, 14, 15 and 16 that are slidably positioned 95 u on the guide bars. A frame 1s composed o the guide blocks and cross bars 1'8 and 19. The cross bars 18 and A19 ma be made of threaded elements, or pipe an pipe fittings,

-but y'we do not'wish to be limited to this form 100 of construction as equally satisfactory results may be had from other materials. The cross bars 18 and 19 are secured together andare maintained in spaced relationship with each other by struts 20, 21, 22 and 23. Supporting hooks 24, 25, 26 and 27 downwardly extend from the cross bars 19k upon which articles to be immersed within the tank or vat may be supported. A counter-balanced relationship is maintained between the supporting head and the valve assembly for normally maintaining the supporting head in raised position through the action of a fiexible line 28. The line 28 is secured to a bridle 29 upon its one end and to the valve stem 3() upon its oppositely disposed end. The .line passes over a pulley 31 disposed upon the upper side of the cross bar 3, the pulley being rotatably disposed upon a shaft 32 that is journaled within the supporting brackets 33 and 34. The valve stem 30 is removably secured to the piston head 30A of piston 35 that is reciprocably disposed within the cylinder 36. The cylinder 36 is partially .filled with a fluid, as oil, and the piston 35 has an escapement disposed therein, consisting of a valve 37 that is adapted to being seated upon the lower periphery of the piston 35. The valye 37 ha's a stem 39 that upwardly extends therefrom which has' a passageway 38 longitudinally disposed centrally thereof. The Valve stem 39 passes through a support or journal 40 that is disposed centrally of the piston valve 35. A compressible spring 41 rests upon the spider 42 disposed within the body of the piston valve upon its one end and is adj ustably supported upon the threaded nut 43 upon its other end for predetermining the compression upon the spring 41 relative to the valve stem 39. A needle valve 44 is disposed within the up er end of the valve stem 39 and is adjustably positioned and adapted to be seated upon t e passageway 38. The' passageway 38 terminates in a dual passage 45 and 46 and the valve 44 is adapted to regulate the mouth of the openingdisposed within the passageway for redetermining the return of flow of the iuid through the valve. The counter-balance 47 is disposed upon the flexible line 28 that normally returns the piston to its lower position and the supporting head in its raised position. When the head is manually operated to immerse materials sulpported upon the supporting head, within t vat, the opening disposed within the passageway 38 predetermines the rate of return of the supporting head and predetermines the time o immersion of the materials being treated within the vat.

It may be found desirable to make the de-H vice operate automatically through a combination of hydraulic and mechanical elements. Where this lis desired, the devieemay be made as illustrated in Fig. 5 wherein the supporting head 48 is mounted upon guideways 49v and 54 are secured to the supporting head 48. y

A piston rod 55 is secured upon its one end to the supporting head and a piston is disposed upon the oppositely disposed end and is actuated within the cylinder 56. @parating fluids under pressure are supplied to the cylinder through the pipe 57. A hand operated valve 57A is disposed within the pi e 57 and the same is adapted to be manual y set through the action of a hand lever 58. The hand lever 58 is supported about a journal pin 59 that is disposed within the bracket 60 outwardly eXtending from `the base of the valve assembly. The lower end of the lever 58 is secured to a link 61 that connects thethe amount of opening within the valve and therefore predeterminin the rate of return of the fluid from thecylmder 36. When it is desired to actuate the device, the materials to be immersed are supported upon the hooks 68 ofthe supporting head and the lever 58 is thrown over until the locking pin'69 engages the locking latch 70 that is journaled to support 2 and the free end of the locking latch 70 is in registerable alignment with the trip lug 70A and the opening of the valve 57A forces the immersing head downward. The operating fluid is for actuating the piston, the fluid being admitted into the u per end of the cylinder 56. Theengagemento the trip lug 70A with the free end of the locking latch 70 unlocks the latch from the locking pin and the spring 71 returns the valve 57A to its normal position through its connection with lever 58. Simultaneously-the valve 63 is opened through the tensioning of the spring 71 and the fiuids leave the cylinder 56 and the `counter weights 51 and 52 return I the supporting head to its normal position.

While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to con- A disposed in spaced relationship within the frame, an article supporting head slidably disposed upon the guide bars, a liquid holding cylinder vertically disposed betweenthe guide bars, a piston reciprocably disposed Within` the cylinder, said piston having a plurality of valves disposed Within its body, one of said valves being an adjustable needle valve, the other of said valves having a hollow valve stem and being adapted to be main# tained in closed position, a piston rod secured to the piston, a counter balance secured to the piston rod, and a iexible support securedto the article supporting head and to the counter balance for connecting the supporting head to the piston and valve mechanism disposed Within the cylinder.

EDWARD R. STEVENS. ARTHUR F. NICOLAI. 

